Danfoss VLT Refrigeration Drive FC 103 Programming Manual page 181

Parameter Description
25-85 Relay ON Time
Array [2]
0 [0 – Readout of the value for relay ON time. The
h 2147483647 pack controller has separate counters for the
*
h] compressors and for the relays that control
the compressors. Compressor cycling is always
done based on the relay counters, otherwise it
would always use the new compressor if a
compressor is replaced and its value in
parameter 25-84 Compressor ON Time is reset.
To use parameter 25-04 Pump Cycling, the pack
controller is monitoring the relay ON time.
25-86 Reset Relay Counters
Option: Function:
[0] Do not reset
*
[1] Do reset Resets all elements in parameter 25-85 Relay
ON Time.
25-87 Inverse Interlock
Shows the inverse interlock status of the connected compressors.
The binary value shows compressor 1 rightmost and compressor
8 leftmost.
Range:
0 [0 - 255]
*
25-88 Pack capacity [%]
Shows how much current the configured pack of compressors or
condensers utilizes.
Range:
0 % [0 - 0 %]
*
3.20.8 25-9* Service
Parameters used in case of service on 1 or more of the
compressors controlled.
25-90 Compressor Interlock
Array [2]
Option: Function:
In this parameter, it is possible to disable 1 or more of
the fixed lead compressors. For example, the
compressor is not selected for staging even if it is the
next compressor in the operation sequence. It is not
possible to disable the lead compressor with the
compressor interlock command.
The digital input interlocks are selected as [130 – 132]
Compressor 1-3 Interlock in parameter group 5-1* Digital
Inputs.
[0] Off The compressor is active for staging/destaging.
*
[1] On The compressor interlock command is given. If a
compressor is running, it is immediately destaged. If
the compressor is not running, it is not allowed to
stage.
MG16H202
Programming Guide
25-91 Manual Alternation
Range:
0
*
Function:
Function:
Danfoss A/S © 05/2016 All rights reserved.
Function:
[ 0 - par. Readout parameter for the actual variable speed
25-06] pump in the system. When an alternation takes
place, the lead pump parameter is updated to
reflect the current variable speed pump in the
system. If no lead pump is selected (cascade
controller disabled or all pumps interlocked), the
display shows N1.
3 3
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